13 in my best friend's driveway while her parents were out to dinner.
Her dad drank a bit too much that night and went straight to bed when they got home. When he came outside the next night to the fridge in the garage (where they always kept their alcohol) and saw all the beer that was gone he said "Man, I must be building up a tolerance if I drank all that beer and don't feel worse than this!"
We still laugh about it to this day. (We also made daquiris with it that night, they tasted like bubble gum!)